uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/development/python-modules/constantly/default.nix

@@ -0,0 +1,18 @@
+{ lib, buildPythonPackage, fetchPypi
+}:
+buildPythonPackage rec {
+  pname = "constantly";
+  version = "15.1.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "0dgwdla5kfpqz83hfril716inm41hgn9skxskvi77605jbmp4qsq";
+  };
+
+  meta = with lib; {
+    homepage = "https://github.com/twisted/constantly";
+    description = "symbolic constant support";
+    license = licenses.mit;
+    maintainers = [ ];
+  };
+}